EF Core: Soft delete with shadow properties and query filters

Question

I\'ve created an interface to try to do a soft delete, mixing shadow properties and query filters. But it\'s not working.

public interface IDeletableEntity {         


        

Answer 1

I've found a simple solution for my answer ;-). Thanks anyway Ivan Stoev

The interface is:

public interface IDeletableEntity
{
    bool IsDeleted { get; }
}

And in your model Builder configuration:

builder.Model.GetEntityTypes()
                       .Where(entityType => typeof(IDeletableEntity).IsAssignableFrom(entityType.ClrType))
                       .ToList()
                       .ForEach(entityType =>
                       {
                           builder.Entity(entityType.ClrType)
                           .HasQueryFilter(ConvertFilterExpression(e => !e.IsDeleted, entityType.ClrType));
                       });

You need to convertfilterExpression

private static LambdaExpression ConvertFilterExpression(
                            Expression> filterExpression,
                            Type entityType)
                {
                    var newParam = Expression.Parameter(entityType);
                    var newBody = ReplacingExpressionVisitor.Replace(filterExpression.Parameters.Single(), newParam, filterExpression.Body);

                    return Expression.Lambda(newBody, newParam);
                }